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Finding the Fourth Proportional to 1,177.32, 1,624.71 and 828.62

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Solution

The fourth proportional to 1,177.32, 1,624.71 and 828.62 is: 1,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.32 : 1,624.71 = 828.62 : x
  2. Step 2: Convert to fraction form
    1,177.32/1,624.71 = 828.62/x
  3. Step 3: Cross multiply
    1,177.32x = 1,624.71 × 828.62
  4. Step 4: Simplify right side
    1,177.32x = 1,346,259.08
  5. Step 5: Solve for x
    x = 1,346,259.08/1,177.32
  6. Step 6: Final answer
    x = 1,143.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.